Dell Inspiron One 2330 No POST unless RAM is removed/reinserted

I have a problem with my Dell Inspiron One 2330. My brother sent me this all-in-one device with a "black screen" issue. I powered it on and it seems the OS won't load. It was an error on my part to just hastily install Windows 10 on it via usb, deleted the partitions, and installed the OS on the remaining one. All was fine, I upgraded the BIOS, it went well, at some point the screen went black, probably because of the auto update by Win 10. To make the story short, I am now faced with 2 problems. First, the dell all-in-one, won't POST after a shutdown, it just powers on and off, fans on and off, every 4-5 second intervals, no beeps, just the power led light (white, blinking every 4 sec). The second problem is that upgrading to Intel HD driver gives a black screen, or after installing a driver that needs restart, at times the screen turns black, although windows is still running normally. It boots properly, after I remove a RAM (or after reinserting it again), and screen works fine if I disable Intel HD or if I just use the basic Microsoft Display Driver, though occasionally I still encounter a few "black screens". I downgraded to Windows 8.1 OEM to better control updates. Problem still persists, I have to remove a RAM (or reinsert) each time, for the all-in-one pc to boot properly. Diagnostics are all good. I upgraded or downgraded the BIOS to no avail. I checked on things that might cause a short, found nothing. Notables are: I can't install Intel AMT HECI drivers provided by Dell for the product. I get an error 8193 Intel (R) ME cannot locate device driver after a finished BIOS update via USB dos. If I reset (jumper) the BIOS (with RAM removal), the buttons on the side of the monitor work and displays options (vga, hdmi input) on the screen, normally it doesn't show options when I am on Win 8.1 desktop. My guess is that, it is akin to a BIOS corruption, like something is preventing communication before it all starts, since it can't find the Intel ME drivers. I don't know anymore. Help. P.S., I disabled hibernation, because if it sleeps, it will result in an unwakable black screen.